1. EXECUTIVE SUMMARY
- CVSS v3 7.8
- ATTENTION: Low attack complexity
- Vendor: Schneider Electric
- Equipment: Easergy Studio
- Vulnerability: Improper Privilege Management
2. RISK EVALUATION
Successful exploitation of this vulnerability may risk unauthorized access to the installation directory for Easergy Studio, which could allow an attacker with access to the file system to elevate privileges.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
Schneider Electric reports that the following Easergy Studio products are affected:
- Easergy Studio: Versions 9.3.1 and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER PRIVILEGE MANAGEMENT CWE-269
An improper privilege management vulnerability exists that could cause unauthorized access, loss of confidentiality, integrity, and availability of the workstation when a non-administrative authenticated user tries to perform privilege escalation by tampering with the binaries.
CVE-2024-9002 has been assigned to this vulnerability. A CVSS v3 base score of 7.8 has been calculated; the CVSS vector string is (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
3.3 BACKGROUND
- CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Energy, Healthcare and Public Health, Information Technology, Transportation Systems
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: France
3.4 RESEARCHER
Charit Misra (Applied Risk B.V. (a DNV Company)) reported this vulnerability to Schneider Electric.
4. MITIGATIONS
Version 9.3.4 and later of Easergy Studio includes a fix for this vulnerability. The fix was released in December 2022, and Schneider Electric recommends that users use the latest version available: https://www.se.com/ww/en/download/document/Easergy_Studio_Installer/
Schneider Electric strongly recommends the following industry cybersecurity best practices:
- Locate control and safety system networks and remote devices behind firewalls and isolate them from the business network.
- Install physical controls so no unauthorized personnel can access your industrial control and safety systems, components, peripheral equipment, and networks.
- Place all controllers in locked cabinets and never leave them in the “Program” mode.
- Never connect programming software to any network other than the network intended for that device.
- Scan all methods of mobile data exchange with the isolated network such as CDs, USB drives, etc. before use in the terminals or any node connected to these networks.
- Never allow mobile devices that have connected to any other network besides the intended network to connect to the safety or control networks without proper sanitation.
- Minimize network exposure for all control system devices and systems and ensure that they are not accessible from the Internet.
- When remote access is required, use secure methods, such as virtual private networks (VPNs). Recognize that VPNs may have vulnerabilities and should be updated to the most current version available. Also, understand that VPNs are only as secure as the connected devices.
For more information refer to the Schneider Electric Recommended Cybersecurity Best
Practices document and the associated Schneider Electric Security Notification SEVD-2024-282-03 in PDF and CSAF.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
- Do not click web links or open attachments in unsolicited email messages.
- Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
- Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely.
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